I want to share these bilingual cards with you because they are such a great idea. They were given to Caspar by a sweet friend so I don't have a source for you. But of course it's entirely possible to make something similar yourself. You can see how attractive materials draw the child's attention. I love having materials like these on our shelves.
I'm not teaching Caspar the French language as a whole but a few words to expose him to French culture. We are really very silly about it. Mainly because we overemphasise the French accent. Just as we frequently say 'bonjour' to each other. I use Google translate to help with pronunciation. Please let me know if there is a better online service to help with this.
Some of Caspar's friends are bi- and tri-lingual, it's fun that he's exposed to a range of languages. It also makes the world feel like a smaller place when we know there is a little friend in France using the same cards - but she's learning English!