There’s some evidence Eostre (or Ostara, Austra, definitely Aušrinė in Lithuania) was worshipped, but the evidence is scant and mostly based on linguistic reconstruction by Grimm in the 19th century. There is evidence of votive offerings to the “Austriahenae” (a collection of matron goddesses) discovered in 1958, but little else.

It’s a nice idea, but eggs were associated with the Christian Easter (Pascha in Latin, which is roughly the name for Easter in most countries that celebrate it), probably as a custom from Persia going through to what’s now Eastern Orthodoxy and from there to Catholics/Protestants as a way to celebrate the end of Lent (eggs being prohibited during that time). It’s still possible it was also Pagan and forgotten, decorating eggs is at least 60k years old, but its association with Easter was only (re-?) initiated through Christianity.

The snail has their eyes at the ends of their stalks.