When used with a magnetic surface, magnets are very useful in stop motion as they help keep things still. You can get magnetic tape on a roll which will last a while. The added bonus is that your puppets will make great fridge magnets after you have animated them. I use magnets a lot with my table-top studios – included in each of my workshops, you will find a guide on how to make one.
Here is where I get mine from Guy’s Magnets. For outside the UK, you will be able to find it in craft stores or ebay. I have not used this brand before, but for teachers in the U.S. I came across this.