Are there any dangerous spiders in Spain?

Doing a few google searches, it would appear that spiders here are relatively harmless but can give a painful bite. Have a look here http://www.practicalspain.com/spanish-arthropods.htm

Best thing to do is to make sure the kids don't pick up any spider just to be safe.

Hope this helps.

Thanks, I'll try to keep them away from picking them up but you know what kids are like.