Playing with goo is that the kids like. Kids who learn to eat by themselves are those who are very much interested in playing with goo. It is disgusting for most of the adults, but kids would love to play with it much. So it is better to make goo at home in the color the kids like and then give it to them for playing.
It is very easy to make goo at home. All you need is a bowl, flour, food coloring and water. Put the required quantity of flour in a bowl and then add water and food coloring to it. Mix them well. It is better to add water little by little while making goo. This would help you to have thick goo. If by mistake you have added more water, then you have to add some flour to maintain the thickness of the goo. There are many food colors available in the market. You can leave the option of selecting the colors to your kids. Instead of flour you can also use corn starch in preparing the goo.