Theoworlds allows you to make an online Birthday Cake. You can design its shape, decorations, borders, candles, etc. You can also write a card that goes with it.
Students can then email the url of their creation and card, and a teacher can post it on a website.
This is just another quick activity that English Language Learners can use for a little (admittedly, very little) language development.
The link is on my Examples of Student Work page under Student Birthday Cakes.