Yes you can make your own home made air dry clay which doesn’t crack! Take wall putty 4 Table spoon and water 4 table spoon! Yes that’s it! Note: take equal quantity of both ingredients Mix it with the help of spoon and try to accumulate all the putty and water together. Use your hands to kneed it. You need to kneed the dough for about 3-4 minutes until it change its color and texture both. Keep it in wet cloth or cling wrap in air tight container. You can only use this dough with in few hours