We visited Funny beach a few times on our holiday last month. Our boys 10 & 12 loved it. Nice beach and not too busy with lots of other attractions to try.
If you do try anything though it's not a cheap day out. You have to pay for parking 5 euros.
Jet ski's 50 euros for 15 minutes. Not cheap but average for in Marbella.
The inflatable trampoline was 10 euros i think for an hour.
There are also Pedalos and lots of watersports on offer so great if you have money to spare and want to do more than lay on the beach. There is also a small kiosk offering drinks and snacks.
No toilets and a shower to wash off your feet near the carpark.
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