We usually need to arrange for our dc presents from FIL as he finds it hard to do these things him self and to get into mind of what 6/8 yr old girls wants. Was thinking about maybe a science kit for the older two girls and then something easier for 4yr old boy. Not sure I want to kill raise animals, but was thinking of a kitchen chemistry set (he used to be a chemist so will love this) for dd1 - FIL will reminisce about how he nearly blew up his parents flat with chemistry set but dh bit phobic weary of chemicals and don't have gas masks and decontamination suits for a normal chemistry set.
Then maybe an easy electronic kit for 6 yr old and something cheaper for 4yr old - needs to be 4/5 yr level rather than 3/4 as he's keen to be older. Generally limit is £30 ish for all three but that side of family always spoil ds so won't matter if his is a bit cheaper Any recommendations? )