BLOG

Hearing is a chain of parts passing a sound along, each handing it to the next. Label the pinna, ear canal, eardrum, ossicles, cochlea and auditory nerve, and follow a sound all the way from the air outside to a signal your brain can read — in an interactive playground.

Your ear does a second, hidden job: balance. Inside it sit fluid-filled loops that sense spinning and a chamber that senses tilt and gravity. Label the semicircular canals, vestibule, cochlea, ossicles, eardrum and nerve, and learn how one organ both hears and keeps you upright — in an interactive playground.

The front of the knee shows the bones and ligaments; the back tells the other half of the story. Look behind the knee and label the femur and tibia, the joint capsule that seals the whole joint, and the muscle and tendon that cross behind it to bend your leg — all in an interactive playground.

The knee is the largest and most complex joint in your body — and the one people injure most. Cut it open from the front and label its six key parts: the femur and tibia, the muscle that moves it, the collateral and cruciate ligaments that hold it, and the meniscus that cushions it — all in an interactive playground.

The femur is your thigh bone: the longest, strongest, heaviest bone in your body, and the one that carries your whole weight every step. Learn its five key parts — the head, neck, greater trochanter, shaft and condyles — then label them yourself in an interactive playground.

Your elbow is pulled on all day — by gravity, by every bag you carry, by every time you hang or push. So what stops the two bones from simply coming apart? Look at the back of the elbow and label the ligaments, the bony point, the cartilage and the two bones — and learn what holds the whole joint together.

Bones and joints are just the hardware; nothing moves until a muscle pulls. Label the elbow to see the parts that turn a joint into movement — the muscle that pulls, the ligament that holds bone to bone, the two bones it links, and the space they pivot in — then build it yourself in an interactive playground.

A joint is where two bones meet and move — and it is far more than just the bones. Cut open the elbow and you find smooth cartilage caps, a sealed capsule of slippery fluid, and tough ligaments holding it all together. Learn what each part does, then label them yourself in an interactive playground.

Cut a bone open and it is nowhere near solid: a hard outer shell, a light honeycomb inside, a hollow centre full of marrow, blood vessels threading through, and a smooth cushion at each end. Learn what each part does — then label them yourself in an interactive playground.

The leg is built like the arm turned to a heavier job: one thick bone in the thigh, two below the knee, and a kneecap in front. Learn what each bone does — why the tibia bears the weight and the fibula barely does — then label them yourself in an interactive playground.

The foot packs twenty-six bones into three groups: ankle-and-heel tarsals, the long metatarsals, and the toe phalanges. Learn what each does — how the talus takes your weight and the arch springs you forward — then label them yourself in an interactive playground.

The hand packs twenty-seven bones into three neat groups: wrist, palm and fingers. Learn what each group does — and why the thumb has one fewer bone than every finger — then label them yourself in an interactive playground.

The spine looks like one bony rod, but it is about thirty-three bones in five regions, each shaped for a different job. Learn the regions of the backbone, then label them yourself in an interactive playground.

The rib cage has to do two opposite jobs: guard the heart and lungs like armour, yet move with every breath. Learn its parts — the breastbone, the springy cartilage, and the true, false and floating ribs — then label them yourself in an interactive playground.

The arm is built from one thick bone in the upper arm and two slimmer bones in the forearm, meeting at a hinge. Learn what each bone does — and why the two-bone forearm is what lets you turn your palm — then label them yourself in an interactive playground.

Each hip bone is really three bones fused into one, meeting at a deep socket. Learn the parts of the pelvis — the blade, the sit bone, the front bone and the hip socket — then label them yourself in an interactive playground.

The skull looks like a single bone, but it is really about twenty-two locked together — with just one left free to move. Learn what each main part does, then label a skull yourself in an interactive playground.

Word classes are usually taught as definitions to memorise, which is why they slip. Learn the four main jobs a word can do, and the removal test that identifies each one, then match the jobs yourself in an interactive playground.

A sentence is not a line of words with equal status — three of them do the structural work. Learn to find the verb, the subject and the object, then label a real sentence yourself in an interactive playground.

Active and passive are not good and bad writing. They are two ways to report one event, and they differ in which part goes first — which is why one of them can leave out who did it. Build both versions yourself in an interactive playground.