Animating an Excel Chart/Graph

I have an excel chart; a bar chart combined with (trend)lines.
Its in my powepoint presentation(pp). As its fairly complex, it would be really nice to animate it.
I have in powerpoint as a chart, as opposed to a picture.
I have managed to ungroup the data points in the chart in pp. The trouble is:
I want the first chunk of the series of bars to appear first. I click control on this series to animate this first. It appears, but as the rest of the chart was never got rid of, so does the rest of the chart.. I tried having an exit strategy for the chart before it comes in, but can't do this - there are too many data points to select them all and have them all disappear.
There must be another way?
Ideally, I'm after the first chunk of bar series to come in, followed by a trendline above it, then a next chunk of bar to go on top of the original series, and a second trendline above that, x5.
Help, advice, tips, all very much appreciated.
Thanks!