Wachana na Mambo ya bouncing castles..how old are your kids...of they are teens endeni Mt Longonot for a climb and walk round the crater...if younger then muende Hells gate...hire bikes and ride to see the devils bedroom...then after hapo you drive to the lake for a 30 mins boat ride and then off you go Olkaria to spend the rest of the afternoon swimming and lunching at the heated pool...and then drive back home at 7pm....total cost less than Ksh 10,000...I know a lot about the hotels in Naivasha muniulize