I made a blastocyst for a colleague’s leaving cake. For those of you who are not sure what a blastocyst is, it is an embryo that is about 5 days old (humans that is). I made a vanilla sponge and plopped plenty of vanilla buttercream and strawberry jam inside. I then created the embryo by using sweets. Those  ‘jelly tot’ like sweets look a bit GM. If you’re not convinced it’s a blastocyst, then feel free to think of it as a UFO or something equally fun.