G.L.I.M.P.S. of my studio - My Collection

I love collecting simple but tactile things and since we live very near botanical garden, it is so easy to collect hundersts of snail shells... Recently I have also added some sea shells and some fantasticly round but bumpy stones from thermal springs in Italy. I washed them all in boiling water with detergent and we used them for some landart with the pre-schoolers I teach. (I have more than is on the picture) ;-)

What do you collect?