Snap Circuits and Lego both are excellent. Here are a few on my 9yo son's wishlist (from Dad): http://www.amazon.com/Makedo-FreePlay-Kit-For-One/dp/B007UN44KW/

Snap Circuits and Lego both are excellent. Here are a few on my 9yo son's wishlist (from Dad): http://www.amazon.com/Makedo-FreePlay-Kit-For-One/dp/B007UN44KW/ref=wl_it_dp_o_pd_nS_nC?ie=UTF8&colid=2E6E7OM20W68O&coliid=I3CGV24QR5FRXD http://www.amazon.com/Makedo-FreePlay-Kit-For-One/dp/B007UN4... http://www.amazon.com/How-To-Balloon-Animal-Kit/dp/B000ELV4E6/ref=wl_it_dp_o_pd_nS_nC?ie=UTF8&colid=2E6E7OM20W68O&coliid=I1Y6NSBQ32FOLI http://www.amazon.com/How-To-Balloon-Animal-Kit/dp/B000ELV4E... http://www.amazon.com/Art2-D2s-Guide-Folding-Doodling-Activity/dp/1419705342/ref=wl_it_dp_o_pC_nS_nC?ie=UTF8&colid=2E6E7OM20W68O&coliid=I23DF8LOGZXQ46 http://www.amazon.com/Art2-D2s-Guide-Folding-Doodling-Activi... http://www.amazon.com/gp/product/B007GC0IO8/ref=oh_details_o02_s01_i06?ie=UTF8&psc=1 http://www.amazon.com/gp/product/B007GC0IO8/ref=oh_details_o... (and related kits) HTH