Amazon has on sale (70%+ off) some Finding Dory model kits by Bandai.
Bandai makes high quality plastic model kits, they are the ones behind all the nice Gundam models. To get Bandai stuff under 3 bucks is a steal
Build Your Dory Model Kit – $2.19 Add-on item
Build Your Nemo Model Kit – $2.80 Add-on item