Bought as a gift for my Mum and planned to get all the grandkids in with her. I knew it would be tough with two particular smallies, so I saw a video of doing a cast with a few people, then having other people hold that cast to make another mold. Thought it was a great idea! So had my mum with two little ones first and found a narrower plastic bucket to do the job. We had a no thermometer with us, so there was a bit of argument as to what 21° was. I am so glad we divided the mixture in two, because the mold was setting while I was mixing it! So definitely recommend starting with COLD WATER if you are unsure of temperature. So that mixture was dumped and we started round two with cold water. Used the same narrow bucket of ours since we had less mixture. It was a tight squeeze with mum and 4 grandkids, aged 9 months, 3, 5 and 7. We just got them to shove their hands in any way they could. The 3 year old was squealing, but we made an exciting game of counting up to 100, which continued on to about 120 seconds. What can I say.. AMAZING! We are so pleased with how it turned out. With our own mistakes I honestly thought it was going to be a disaster, but no! Captured so much beautiful detail. My mum is going to treasure forever. Tip: use a sewing needle to pluck out alginate in tight crevices. Have 4 friends expecting babies soon and will be buying casts for all of them!