30$ to 50$
Spinach, Carrots... Stuff like that.
You use grids and chloroplast which I got at Target and a Construction Shop.
It is his nose but it doesnt look the same as it did when he was younger
If you buy a guinea pig off a pet store it usually costs between 30 and 40 dollars, but some things like Craig's List have people selling their guinea pig for 5$ and some are even free.
Hope you find it useful.