Build a solid from unit cubes
The base has a fixed length and width. Add or remove layers to match the height in the story. Every cube has sides of one unit and occupies one cubic unit of space.
LITTLE PRACTICE. BIG CURIOSITY.
Volume Builders helps children connect three-dimensional space with multiplication. Eight challenges ask children to build rectangular prisms from equal layers of unit cubes and calculate their volume. Play without signing in, with spoken directions and hints from Pip.
Play fifth grade math with PipJump right in. No sign-in needed.

EXPLORE THE GAMES
The base has a fixed length and width. Add or remove layers to match the height in the story. Every cube has sides of one unit and occupies one cubic unit of space.
The solid view shows the prism, while separate layer maps reveal every cube, including those hidden inside. Each square on a map is the top of one cube. Count a layer, then multiply by the number of layers.
Use volume = length × width × height and choose an answer in cubic units. For example, a prism that is 3 units long, 2 units wide, and 2 units high contains 12 unit cubes.
This game practices unit-cube volume and whole-number rectangular prisms, connected to Common Core 5.MD.C.3–5, especially 5.MD.C.5a–b. It introduces one part of fifth-grade learning; use it alongside classroom teaching, discussion, and hands-on models.
A FEW MINUTES TOGETHER
There is no time limit for answering. A correct answer moves to the next question after five seconds; Next moves on sooner. Follow your child’s pace and pause whenever they need a break.
Great teachers give children guidance and encouragement every day. Families can build on classroom lessons or use these games for extra practice alongside their homeschool curriculum. Choose what connects with your child’s interests and what you are teaching.
For a flexible routine that pairs a game with reading, conversation, and hands-on practice, explore our homeschool learning games guide.
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