Try Bridge Builders: how many more make six?
Four wooden planks are already on the bridge and two spaces are empty. Your child adds the missing planks to make six. It is the missing-number idea behind number bonds, written 4 + ? = 6.
Try it here
Tap Rusty, Pip or Barnaby. Their words appear here.
Bridge Builders preview
4 + ? = 6, checked by the Kindred math engine. Characters only react; they never decide the answer.
Rusty
Pip
Barnaby
- 1
- 2
- 3
- 4
Four pieces are ready. How many more make six?
What your child practises
- Finding the missing part when the whole is known: 4 and what make 6.
- Counting the empty spaces instead of recounting every plank.
- Trying again with no penalty: a plank that does not fit just invites another go.
Rusty builds, Pip counts, and Barnaby offers a hint only when asked. Everything they say also appears as words on the screen.
About this preview
- No account or sign-in. The activity saves no progress and sends nothing. Like the rest of the site, it may remember display settings such as text size on your device.
- Read aloud is off until you turn it on, and works on your device only.
- No timers, scores or streaks. Reduce motion is available, and the activity works without sound.
The full practice, with progress saved for your child, is in the signed-in area. This page is a free preview of one activity.