im going to paint little bitty pumpkins with them. they have some for like a dollar at walmart where i am at and some paint that is washable and nontoxic. i had some trace their hand and make a turkey or ghost or spider. you can get a big piece of paper take them outside and let them just have fun step on the paper with paint hands just let them go crazy with it. those are just some ideas and if you search on google you can find some amazing sites. also there is a few good groups on cafemom that give out their crafts
wow mine are just about the same ages as yours, last night i made jello. and today they are going to help cut them with cookie cutters, messy but it gives us something to do. i also like take the to the park while its still nice outside.