Whirly Thing on Glass

[Sadial]

My 7 year old son discovered this swirly whirly thing on the glass this morning. He said, "Mom this is the discovery of a lifetime... what is it?"

So what do I tell him? Eggs? It is the size of a nickle.

Thanks.

 

[mr_X]

looks like snail eggs to me.

 

[Sadial]

Thanks. They seem to be a real crowd pleaser with 7 year olds!