Tower Crane, Crawler Crane, Rough-Terrain Crane & Truck Crane — a step-by-step lesson for grown-up and child
This lesson teaches the crane family: the skyline giant, the treads-and-tonnage lift, the mud-hopping rough-terrain and the drive-itself truck crane — with the counterweight experiment at the centre.
What is this?
Four cranes: tower crane (the skyline signature), crawler crane (heaviest lifts on treads), rough-terrain crane (jumps mud) and truck-mounted crane (drives to every small job).
What does it mean?
Four cranes, four answers to one question — how do we lift the heaviest things into the sky? The counterweight is the physics heart: a heavy something on the other side keeps the arm honest.
What does the child need to know?
You need the card and the balance game: hold a book at arm’s length (heavy!), then build a spoon crane with a cup counterweight — lift a pom-pom load.
Why this matters
Tower cranes are the skyline’s signature and children spot them from farther than any other machine. The counterweight experiment turns wonder into mechanics.
What it teaches
Lifting-mechanics thinking (counterweight!), height comparison, terrain-to-crane matching, and arm-hold endurance (the honest way to feel a crane).
Words to learn
tower cranecrawler cranerough-terrain cranetruck craneliftcounterweightload
Say this to your child
“"Tower crane — tallest of all, king of the skyline! Crawler crane — treads and TONNAGE, the heaviest lifts! Rough-terrain crane — hops the mud! Truck crane — drives itself to little jobs. And the secret of every crane: the COUNTERWEIGHT — heavy one side, load flies the other!"”
Step by step
- The family: "tower crane — the TALLEST, it watches the whole city! Crawler crane — treads, and the HEAVIEST lifts. Rough-terrain crane — hops the mud. Truck crane — drives itself to every little job."
- The height sort: which is tallest? (Tower — often higher than the building it builds!)
- The arm test: hold a book at arm’s length — "heavy, right? Cranes do that ALL DAY — with a secret: the COUNTERWEIGHT."
- The spoon crane: spoon arm, tape pivot, cup counterweight — "heavy cup one side… pom-pom load lifts easy the other!"
- The spot: tower cranes rule every skyline — "count them from the window. Every one is building something."
Look closer at the picture
On this card the heading "Construction Vehicles" sits over a tall tower crane, a tracked crawler crane, a rough-terrain crane and a truck-mounted crane — the family, rigged and ready.
Ask your child
"Which crane is tallest?" (tower!) "Which lifts heaviest?" (crawler) "What balances the load?" (the counterweight!)
What your child can say or do
Your child might count tower cranes from every window, spoon-crane everything, or explain counterweights at the playground — the family, spotted and understood.
Out in the real world
Skylines are crane calendars: count them and count the construction. Crawler cranes assemble wind turbines; truck cranes fix every rooftop.
Try it together
Crane School: build the spoon crane, lift loads of increasing weight, adjust the counterweight until it balances — then certify the operator. The skyline awaits.
Understanding check
Ask: "Match each crane to its job." "What balances the arm?" (counterweight!) "Which is tallest?" (tower) — family, physics, skyline: lifting, mastered.
This lesson pairs with the Tower Crane, Crawler Crane, Rough-Terrain Crane & Truck Crane flashcard in the library — print it, show it, keep it on the fridge. Back to Transportation & Vehicles (Class 24).