Mix eggs, 1/2 cup milk, cinnamon, and vanilla in a shallow bowl or dish. Add slices of bread and allow to soak 2 minutes. Flip and soak two minutes on side two. While bread soaks, heat skillet to medium heat and add butter to melt. Swirl around pan.
Add individual bread slices and cook for about 4 minutes per side, until French toast is lightly brown and no longer wet. Using a 5.5 x 3.25-inch bus-shaped cookie cutter or a knife, cut each slice of bread into a bus. Use excess pieces to assemble a road and place underneath bus-shaped toast slices on plate; use a knife to style as desired.
Top French toast bites with two 1/4" banana slices each for wheels and blueberries to symbolize school children. If desired, get creative and garnish with additional fruits (ideas include a cherry for a stop sign, banana slices for lanes on the road).