Kids entertainer for 5 year old?

[vicbar]

My little boy turns 5 in April and I was consiering hiring an entertainer.
Can anyone recomend one that doesnt charge the earth ? Or any ideas to entertain 30ish 5 year olds?

Thanks

We just had a party for my 5yr old son and used this guy. He was great. Kept 30 4/5yr olds entertained for 2 hours.
£185 though !!

Thank you decided to go old skool and get a bouncy castle and let them bounce off some energy.