I highly recommend Gravitas Publications Real Science 4 Kids Chemistry Pre Level 1! My son loved it! There's the text book, work book where they do the experiments, as well as a teachers guide manual. You can view the entire text online and view the entire books here as well as their other books in the series Physics and Biology! They are really awesome!
http://store.gravitaspublications.com/pl1_chem_print/C00PST.html