Danny Dunn and the Anti-Gravity Paint

i think this series is aimed at grade school kids. i probably read most of them when I was like 7-10.
I think they would hold up pretty well although some cultural issues would have to be explained. I don't think these are in print anywhere but used copies are available and there are some ebook versions floating around. The science is unrealistic but it does get the excitement of discovery across and could encourage kids to pursue science and math