Awwww >_< Just let them get used to the idea that you are there first. Definitely approach them but don't be "aggressive" right away or they may be spooked. These are young INFp's I take it and may be very shy, not to say insecure, I think the mouse analogy is not too far off heh. Give them a little crumb to delight them first, if you give them time they will soon show a very different side of themselves. Duality is about mental compatibility, and once you get that aspect going things should be fine hopefully. INFp's are mentally agile and one thing that is delightful with ESTp's is that they can keep up with us, or vice versa