Really not sure if this is a reputable news source. Never heard of this website and as others mentioned here, there seem to be no reports on this topic in the bigger general press outlets.
With reputable sources I don't necessarily mean western media, but also e.g. Al Jazeera doesn't seem to report on this topic. Which would be huge if true.
ABC Australia reported that children mistook unexploded bombs for toys: https://www.abc.net.au/news/2025-10-31/unexploded-ordinance-israel-ibombs-gaza-clearance-war-remnants/105937500
That's still heartbreaking and horrible, but quite a different story than Israel explicitly placing ecplosives disguised as toys.
If one of you found further proofs, I'd be happy if you could share some links.