Owlet: Cube3 is an app that uses the Owlet CubeTower manipulative. Students create numbers by stacking small cubes in the columns of the CubeTower.

Cube3 has five modes. Each corresponds to a different topic in place value: Tens, Hundreds, Money, Hundredths, and Thousandths.

For each topic, there are five different activities.
- Explore: Students place cubes in the CubeTower to create numbers that are shown on the computer.
- Make: Students are prompted to make a target number by placing cubes in the CubeTower.
- Build: Students solve number puzzles. For example, students might be asked to build a number between 200 and 300 using 5 cubes.
- Compare: Students create a number in the CubeTower and then compare it to a number generated by the app.
- Round: Students use the CubeTower to round a number to a specified place.