We just love this idea. Tape up some fabric or paper with a see through pattern and let your little one trace the lines. If you are lacking in a little sun you could also use a lamp.
This special paper enables you to use the suns rays to bleach pretty patterns from things like flowers, leaves and templates. Pop on over to PBS for full instructions.
Sundials are great fun and these versions made from paper plates are so simple.
Last but not least this fab idea from Happy Hooligans using wax paper. Perfect for an afternoon activity on a lazy sunny day.