When I was little and had collected some shells, my Grandma helped me make a keepsake box for my Mum. The box was made of a lightweight wood and we set the shells into some sort of white paste that then hardened. (My Mum still has this box with all the shells intact and I'm 40 this year!)
We've recently been on our first family holiday with our DS who is 1 and I collected some shells and though it might be nice to do something similar. Does anyone have any idea what my Grandma might have used to set the shells in? Would some kind of putty type stuff do it?