We hired a car by lots of bargain from Kualalampur to Penang at 900 Ringgit (which includes all site scenes at Penang). Again, the price is high because we had to take a big car (8 seater). I suggest not to go Penang by road from Kualalampur unless you want a road trip, it's a boring 4-5hours journey. Better, book a flight it'll charge around 80 Ringgit/person if booked earlier. Though we did enjoy the journey much, we stopped at Ipoh for breakfast and it is a nice holiday feeling. In Penang, we first go for Penang Hill and sadly found it over hyped. Maybe the place is beautiful but first we queued for 1hrs to get the train and the way back was much worse, we kept in line for almost 2 and half hours. The journey by Funicular train to Penang Hill is quite adventures as the train runs in 45 degree angle, the view from the hill is beautiful. I'll suggest to visit here either in the morning or in the evening, so you can enjoy the scenery and it's not too hot then, also prefer to avoid holidays, it is too much crowded at that time. Other than, Penang Hill you can visit George Town for upside down museum, walk for street foods and street arts in Georgetown is a must thing you should visit.