Here is something entertaining, especially for younger learners. http://www.vidtionary.com is pretty much what it claims to be: a video dictionary. In other words, you choose a word and watch a short video which demonstrates its meaning, a type of moving flashcard basically. The site is still developing so keep your eye on it as for the moment the choice is limited but if it continues to grow it could be very useful. Rather than searching for a word in the hope there is a video for it I would concentrate on using the CATEGORIES or COLLECTIONS sections as a means of getting a feel for what is available. The GAMES option is also interesting or potentially so as the site grows.
Have fun during the Easter holidays if you have them!