I save them. I love seeing the growth of my babies, so I save them and then once I have enough, I pin them in display cases. Is that weird? Haha. I just love seeing how much bigger they get! Especially my Theraphosa. When I got her from my friend, she was the same size as my adult G. rosea, about 4-5 inches. Now she's about 9 inches. Comparing each of her molts lined up is just... WOW. I can NEVER get over it. So, what do you guys do?