My granddaughter use to love to wind bobbins using my Sidewinder. I still have a shoe box full of wound bobbins. I think we bought all the bobbin sold at Walmart one summer. LOL
I took the top off (screws) and put a big piece of heavy scrap metal DH had laying around and that stopped it from tipping over. It is top heavy even with batteries in it. There is a tension adjustment you can set so be sure and read the instructions.