Best free online tools for education?

Hey everyone, sorry if I'm in the wrong spot here... hope not!

So... I could really use some help. I need to whip up three educational videos that’ll actually keep kids interested.

The first one was about supporting kids with special needs. I ended up using Adobe and honestly, it was awesome. The animations are super easy to work with and the watermark is tiny, so I was pretty happy with how it turned out.

For the next couple of videos, I’d love to try a different free program—maybe something with cool effects... but I'm totally lost on where to start.😢😢

Any recommendations for good software?
Thanks so much! (Hope that makes sense)

Please attempt to provide a more detailed description regarding the intended functionality of this software.

Oops, my bad... I’m never really sure how to put things into words properly...

So, this video basically just needs some internet photos, text, and music... which I think I could pull off in macOS movie maker
. But that app keeps freezing on me, so it would be awesome if there was an online tool instead.

Also, it’d be cool if the program had more visual effects, since I’m struggling to make anything catchy for the kids using movie maker.
By effects, I mean transitions, overlays, maybe even adding little characters. Sorry if I'm using the wrong tech terms—computers aren't exactly my thing.

Still feel like I'm rambling... If anyone isn't too bored, I'll drop the program I used for my first video here
but if you know of anything similar, please share https://www.animaker.com/

Someone suggested https://biteable.com/ too. It looks pretty decent since it's free, though their watermark is a bit chunky. If I can't find anything better, I guess I'll just stick with it.

Hopefully that makes a bit more sense...