oh and i didnt let the kids know about the injections. i did them early in the morning in a locked bathroom. i personally think its too big a deal for young children to comprehend. needles scare enough adults. but my boys have seen me have BT's as to me that is completely different. it actually helped as my eldest was extremely sick last week and had to have BT's, but was so relaxed coz he has seen mummy have them.