Home Activity

Dinosaur Train: Bridge Builder

What's The Point

Your dinosaur friend needs a bridge to get across a deep canyon. Using some estimation and simple addition, build a bridge and lead your dino friend safely to food.

Related Games

Classic in the Jurassic Jr. –Install the app, and play the Bridge Builder game to help the dinosaurs get around Troodon Town.

Pinecone Pass – Practice “near” and “far” as you pass the pinecone like a football.

Air Show – How far can your dinosaur fly?

This Activity Will Help Your Child

  • Use units to measure length
  • Add two lengths to create a whole
  • Use words for describing length such as longer and shorter

Book Suggestions

  • Actual Size
    by Steve Jenkins
  • Inch by Inch
    by Leo Lionni


  • 2 sheets of paper (for the edges of your canyon)
  • 10 sheets of paper (for bridge pieces)

How Do I Do It?

  1. Explain to your child that you are a hungry dinosaur and need help getting across a deep canyon to find food on the other side. Invite your child to build a bridge for you out of “pieces of wood,” or sheets of paper.
  2. First, set up the two edges of your “canyon” by placing two sheets of similarly colored paper across from each other.
  3. You can create a large or narrow space for your canyon, but the space should be measurable by whole sheets of paper. In other words, you might place one edge of the canyon two, three, or even ten sheets of paper apart from the other edge.
  4. Now ask your child to build the bridge by laying sheets of paper edge to edge.
  5. Together you can count the number of pieces used to build the bridge.
  6. Set up a new canyon with a gap of a different width. This time, before building the bridge, ask your child to guess the number of pieces needed. Then have your child lay the pieces and compare the result with her initial estimate. Was your child’s estimate longer or shorter than what was needed?
  7. Continue the game of estimating, building, and counting.

Take It Further

Create grouped sets by taping pieces of paper together edge to edge. You might have a collection that includes: 1sheet, 2 sheets, 3 sheets and 4 sheets. Be sure to create duplicate sets, so your child can have some flexibility. For example, your child might use two of the 4-sheet pieces to span an 8-sheet gap. Challenge your child to build a bridge by combining sets of different lengths.