There are several websites online that will give you arts and crafts ideas to keep you occupied with your kids. You can teach them step by step after reading.
Some fun and easy activities for the kids during a holiday get together are holiday themed arts and crafts Nd games.
Parent's magazine has a website that provides plenty of easy craft ideas for kids. Spoonful.com is another site which has interesting and original ideas for fun and easy children's craft projects.
If you are looking information on what are some fun kids Halloween crafts, the best site to find this answer is on crafts.kaboose.com/holidays/halloween/
School Crafts is quite a broad category for crafts. Essentially any craft that has an educational value can be considered a School Craft. I found Science Crafts for Kids to be related to what you are looking for. There are also Bible Crafts for Kids that are very educational but deal with learning the Bible. Then again for some general Crafts for Kids you can apply any sort of lesson to them so they can be educational.
There are many online. Some have hundreds of free crafts for kids, printable kids crafts and bible crafts for kids. On some sites, you can create everything on the site with items already in your home. For examples, see the links listed under Sources and Related Links.
There are many websites that offer tutorials on crafts for kids. You can visit Crafts for Kids to look through their list of hundreds of classic craft ideas. They give you step by step instructions in their tutorials making their crafts easy to learn! Danielle's Place will give you tones of craft options to make. They sort their categories by animals, holidays, dinosours, and more. Their site has enough tutorials to keep your kids crafting for a long, long time.
You can make paper chain angels, make spaghetti necklaces or bracelets, or paint bird houses together.
If you are looking for some fan crafts to do with your kids for Halloween, you can carve a scary face on a pumpkin, and you could also cut out ghosts and decorate the house.
Pinterest has some awesome and cheap ideas for craft ideas for kids to make on a rainy or sunny day! Also Parent 24 has some really cheap ideas for crafts for kids to do themselves.
Browse through Pinterest.com for cute and easy kid's crafts. They have many great ideas that are cheap and use basic supplies (such as cardboard tubes, construction paper, and magazines).
Crafting a Christmas tree from paper is a very good craft idea but for other kids crafting presents for each other is also entertaining for them and this craft will be cheap but fulfilling.
I would suggest you to go online on www.spoonful.com they have many crafts that you can choose with you grandchildren. They are a lot of fun and easy to make.