As you have discovered, you are not able to claim the Arts Amount credit. As to child care expenses, your daughter would have to be under 16 at some time in the tax year, unless she was mentally or physically infirm.
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns360-390/370/lgblty-eng.html
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns206-236/214/lgbl-eng.html
