This is a great teaching opportunity.
Go and challenge the suspension - but bring the child with you. Make sure you're prepared, and keep your cool. Ask why curiosity is being stomped on, rather than action. Let them try to explain it.
Then, when they uphold the suspension (which, in the currently PC environment they will), explain to the child that, sometimes, government bureaucrats are *#$#(__#( idiots, and shouldn't be trusted as the absolute guardians of, well, anything. Make sure they understand that what they did was fine, but even so there can be consequences.
And, during the suspension, make it slightly unpleasant (room cleaning, bathroom cleaning, etc), but also make it a celebration of intellectual freedom - take them to the park, to the local amusement park, whatever. Let them know that curiosity and intellectual pursuits are great things, even though some of those pursuits are frowned upon in current society. Take them someplace slightly dangerous (Burning Man) to let them know that there are people outside the mainstream.
1998 Maristar 200VRS