This one isn't child friendly, but it is nice and easy, and a great way to use up the cheap chilli beans (which really don't taste very nice)
Easy Peasy Chilli Dip
1x can chilli beans, drained and rinsed
1 clove garlic
1-2 tsp lemon juice
1/2 - 1 tomato
Place ingredients in blender, blend well, taste and season with salt and pepper if required. Serve with Nachos or vege sticks.