Looking for a good edc for a 6 year old girl who really wants a flashlight. Something simplistic led with micro usb type b rechargeable and good run time/hrs perferably as she has no concept of such things. And a similar yet smaller version for her younger sister (4 yrs) who will want one just to be like big sis.....help? Want to get them something worth having they can keep for awhile as they are foster kids and don't have much to attach to