Sounds like your doing everything right, except ive never heard of using playsand as egg substrate. I use vermiculite (perlite). What i would do is get another small container, poke some holes in it for ventilation, and moisten the perlite so that when squished together it balls up, but not soaking and not too dry. WITHOUT TURNING OR ROTATING THE EGGS IN ANY WAY, you can move them into the new container. If you are not comfortable doing this, i recommend not risking it and keeping them in the playsand just so you dont flip and egg or soemthing. I personally have never heard of using sand, but maybe someone on this board has and has more input. I dont know if it holds humidity that well. If you decide on not moving them, i recommend poking holes anyway for ventilation. Good luck, and KEEP US POSTED!! 
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David - KDRKreatures
2.3 Bearded dragons (Rocco,Chong,Artemis,Cheech,Anna Nicole)
2.2 Eastern Box Turtles (Snappy, Mercuria, Gizmo, Galapago)
1.0 Ball Python (Carson)
0.0.8 Red Eared Sliders
0.1 Timneh African Grey (Roxy)
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