I know that when it comes to making something, having patterns and tutorials always helps me to learn something new. Here, I've compiled the plushie-type tutorials I could find on Deviant Art to hopefully get something creative going this summer!
Try doing some of these, and then modifying them to make your own critters, and be sure to share links to what you've made so we can all see!
All of these tutorials were found right here on Deviant Art, under Resources -> Tutorials -> Artisan Crafts!
Easy Plushie Tutorials
Felt Mini Stuffie Tutorial by RyuuseiHime
Cute and simple, this is one great way to make your own characters into little stuffies, while still learning the basics of sewing!
Food Critter Pattern Sheets by coconut-lane