Plastic beads are made out of plastic. Sometimes they are coloured to add an appealing effect.
plastic
Glass
Put them in water.
Both plastic and wood float's on water. My guess is that the wood is from the pellets.
7/35 or 1/5
A magnet will attract the iron beads but not the glas beads
Plastic beads can be purchased at craft stores, online marketplaces like Amazon or Etsy, and some department stores that carry crafting supplies. You can also find them at specialized bead shops or hobby stores.
Mardi Gras beads are made by first manufacturing a plastic mold. Plastic is injected into the mold, then the color is added. The beads are then allowed to dry and mold is removed. They are manufactured in China.
Since perler beads are little pieces of plastic, it is definitely not good for you. Eating plastic is never recommended or beneficial.
filtration
www.ebay.com