Absolutely agree on the red kite feeding centre at Nant Yr Arian, cant miss it on the main road from Ponterwyd to Aber. There are a number of nature walks there as well.
If you are interested in sport specifically football there is The Welsh Super Cup being held in Aber between the 26th July and 1st of Aug very big youth tourn.
There are some really nice places to eat in Aber, Gwesty Cymru is a very good and its on the prom, Harrys bar in the centre of town.
Also trips around the bay either from the harbour or the main prom.