Alphabet Blocks... all six sides?

You can use a wipe on poly, all 6 sides and dry on your plastic pyramids, and you should be alright.

...a word of warning; any finish with nut oil, i.e. tung oil, walnut oil, Danish oil should be avoided at all costs as they contain compounds which may cause allergic reactions.

We all should be aware that those little kiddos have to taste everything they get their hands on.

If you are in doubt about the Saftey of a finish you can Google the product,
i.e. ‘Tong Oil allergic reactions’ and find out if it is safe to use for your application and intended use.

Best Regards.

Work Safely and have Fun. – Grandpa Len.

-- Mother Nature should be proud of what you've done with her tree. - Len ...just north of a stone's throw from the oHIo, river that is, in So. Indiana.

thin coats of shellac applied on a warm dry day??

will dry very quickly for turning over if a thin cut is used and is non-toxic for kids…

just a thought

Ben

-- Ben, England.

The method GpaLen posted is how I do it. I use Behlens salad bowl finish but Ben’s suggestion would work just as well.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton