You can buy prizes from Kipp Brothers for fairly cheep. Here a rundown of how we did our carnival, the top five most popular prizes in each token catagory :
1 token: tic/tac/toe game, sportsball erasers, return balls(they are on a string), giant backscratchers, mini frisbees
2 tokens: ugly teeth, gummi pizza, swirl putty, sticky lizards, shooting fists
we skipped 3 tokens
4 tokens: sticky sportsballs, skyfighters, glow mouths, punch balls, sparking pinwheel
5 tokens: sport gel watch, wristband ball, mummy ptty, 3d puzzle, bike tool set
we skipped 6 and 7 tokens
8 tokens: football flick game, fuzzy pen&pad, jewelry assortment, skateboarders, camo watch
we skipped 9-11 tokens
12tokens: dirt bike minis, nerf shooter, stretch lizard, tensel halo,puppets
skipped 13-15 tokens
16 tokens: fiber optic boppers, heart tin, inflatable characters, canteen, flower pot paperweight
skipped 17-23 tokens
24 tokens (we only had 3 prizes)
gumball machine, inflatable animals (bigger ones), lip blabber radio
skipped 25-29 tokesn
30 tokens: inflatable chair, mini boom box, mini radio
the small end tokens you buy them for about the same amount of 1 tokens worth, you don't make a major profit but the higher the tokens the bigger profit you make. I hope this helps you figure out your prizes.