Sequencing for kids: Hawker Centre
Deliver chicken rice to hungry diners, one step at a time.
Free · no sign-up · ages 6–12 · works on Chromebooks and iPads
What is sequencing?
Every program is a list of instructions that the computer follows in order, from top to bottom. That idea is called sequencing, and it is the first thing every coder learns. A computer never guesses what you meant. It does exactly what you wrote, in exactly the order you wrote it.
In the Hawker Centre, your robot works at a chicken rice stall. Snap arrow blocks together to walk it to the right table, pick up a tray at the stall and serve it. If a step is in the wrong order, like serving before picking up, the robot can't do it, and you get to find the bug and fix it.
Watch out for the uncle pushing the trolley of dirty plates. He walks the same route every time, so a careful plan can always get past him. Planning a path step by step and checking it by running it is exactly how programmers work.
The levels
- Level 1 Table for One The robot is holding a tray of chicken rice. Walk it to the hungry diner and serve the food.
- Level 2 Round the Corner This table is around the corner. Plan the path before you run it.
- Level 3 Pick Up First Now the robot starts with empty hands. Collect a tray at the stall, then serve it.
- Level 4 Mind the Trolley The uncle with the trolley walks up and down the same path, over and over. Find a way past him.
- Level 5 Two Orders Two tables are waiting. The robot can only carry one tray at a time.
- Level 6 Lunch Rush Two orders and the trolley uncle, all at once. Plan carefully!
- Secret bonus Supper Crowd Get three stars on all six levels to unlock it.
Teachers: link straight to any level, like dotcodecampus.com/maze/hawker/3, and put it up on the projector.
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