Rhythm PIzzas

My 3rd grade students are currently learning about fractions in their math classes.  I thought that this might be a way to help them with this topic while teaching music.  This would be really cute paired with "Pizza, Pizza Daddy-O".

 
In the past I had students create their own pizzas and I'm thinking they could do this also, but this time we'll cut out the slices and do some addition/subtraction problems together (such as - a half note plus a quarter note plus two eighth notes) to create rhythms to read and perform.

Students can also play the rhythms on orff instruments while other students move to them (they love this and I usually use tubano drums set up in a circle with the "dancers" in the middle):
Whole Note: step once and stretch out body
Half Note: hop twice
Quarter Note: walk four steps
Eighth Note: jog eight steps
Sixteenth Notes: tip-toe run for 16 steps (this is our favorite)
 ****A student could hold up a pizza so the others know what to move/play***

Lots of ideas swirling around but I would appreciate your suggestions on how to incorporate fractions.  I've seen some cool ideas with legos too ;)