Magic Rocks

Going Shopping with magic rocks.

Have shops set up around the room with a target on each e.g. If the shop had the number 27 the kids would have to show their magic rocks as two tens and 7 ones. 

They would need to build it showing the shop keeper what it looks like. The shop keeper will replace it with two tens and give the shopper back 7 ones.

Go to another shop and purchase another number.

Whites worth ones

The blue glitter stones are worth10

.

Marbles  are worth 100.

Take it in turns of being the builder and the shop keeper.