Here's a sampling of how our Number Book turned out

Three people:

The four elements (fire, air, water, earth):

Seven colors of the rainbow:

A spider (8 legs) in her web:

This became an elaborate story! It involved three witches, three princes (each wearing crowns with 3 points) who had money bags each holding 3 coins... So, getting to nine (and we did during the creation of this drawing!) involves using various combinations of multiples of 3...

Here, S. did coin rubbings of 10 pennies, plus a dime,
and then drew the border containing 10 blocks...