Black and white solution is looking pretty good. Watch the shape the legs form in the motocross pictogram, it's visually awkward as it is.Which colors are you leaning toward? I prefer the blue and black for winter, and think you could do a black and complementary orange for the summer.The type on the shirts isn't as strong as the pictograms. It's not necessary, and would be stronger if you concentrated on the pictograms.Watch the scale on the shirts. If th pictograms are too large, ou won't be able to make them work when you try to print them.