I Don't want using sugar for my toddlers snacks, but he doesn't like honey. What is the best subtitute for sweet except honey for making cake/ cookie?

You can also try using: Brown rice syrup (http://sg.iherb.com/Brown-Rice-Syrup#p=1) Agave (http://sg.iherb.com/Agave-Nectar#p=1) Applesauce and bananas are also good options for baking. You may have to make adjustments to the recipe when using these. For example, You may need to use more dry ingredients (e.g., the amount of flour) if you are using syrup in place of sugar. For more information on these sugar substitutes, you can refer to this article: http://wholesomebabyfood.momtastic.com/sugarsubstitutesinbabyfood.htm