If you're looking into more sessions down the road, I'd strongly advise investing in a good set of rope. It's the perfect bondage utility to have, as you can say it's for any sort of project, or simply having it for convenience, if someone asks. If you're just starting out, try looking into simple 3/8'' or 1/4'' braided synthetic
coreless rope that you can find at a hardware store - they sell 'em at lengths of 50', 100', etc, but what you can do is cut out different lengths and finish the ends either by melting them or taping them.
Even though inexperienced with bondage, there are some simple techniques one can use with rope that anybody can do, and rope is very versatile when it comes to bondage. There's one simple and quick technique I've learned that can transform a length of rope into a "cuff" for individual wrists or ankles, that you can then tie to a corner of a bed just as a set of "kinky" cuffs can do.
Here is one form of the technique. Simple, right? The thing to remember about rope is that the more surface area of rope touching your skin, the less pressure you'll have in one particular spot (and the less chance of limbs losing circulation too quickly or worse. That said, using something to cushion the rope should it be a single loop as sadistictcklr mentioned will not work very well. Just make sure you
do your research and not half-ass anything; even using gentle materials like long socks or scarves can be very dangerous if you're tying someone up in a bad way.
TLDR: If you're gonna MacGyver a bondage scene where lots of movement or thrashing is involved (like from tickle-torture), or if you use something like rope (which can be very versatile), it pays to look up online techniques and safety tips before the scene.