Everything you need is in there, objects for pasting, the stones, glue and plaster.
The problem is the adhesive. The sticks so badly on the smooth plastic, that when the heart can the entire edge is incurred in 4 major parts. Have the parts then glued with UHU transparent again. Now it holds.
Yes, the craft glue is better for children and does not smell, but if it does not think it is nonsense.