I bought this book for my inquisitive 6 year old daughter who likes to 'do science'. I was really impressed by the number of activities that we could get straight on and try as lots of resources were easy, house-hold items we already had. I would've liked a list of needed materials for each experiment as it can be annoying to get halfway through and find you'd not noticed you needed something, but that's a small gripe.
The science itself is fine, but for me, this is just a nice book which helped me find things to do with ny daughter - great stuff!