How to capture motion AND very close up on DSLR?

I want to take a photo of my daughter blowing a dandelion seed head and catch the seed pods as they float through the air. I have taken a few but the motion has been blurred. I would like to have the detail that macro gives me but realise I probably need the sports setting.
I amgoing to try in a while with the sports setting but wondered if anyone had any ideas of how else I could achieve what I want, or close to it?
I don't want to go into manual settings just now as I'm still getting to grips with the cameras pre sets and don't want to confuse myself!
I have a Nikon D5000 with kit lens. I'm getting a new 75-300 lens next month. Will that lens help me with this desired photo?

Macro is great for close up, however, because of the slower shutter is will give you a blur with motion. The motion may not be from the movement of your subject, it could be just from your hands. Try using a tripod or resting yourself on something when taking the picture. You definitely can try the sport setting, but that will give you focus in the background as well as in the foreground. If you're using macro you will just have focus on your subject. If you want to try the manual settings, it's not as hard as you may think. Try just using a faster shutter speed.

If the seed pods are truly blurred, caused by their motion at a slow shutter speed and can be captured if you use a flash during the exposure

Forget the "sports" setting and if you are NOT going to use flash, use a shutter speed faster than 1/800th second

Presets are very limiting, so using the cameras light meter to determining the proper exposure is really the easiest and most accurate way to capture your action photos… The way the pros do it on a day to day basis

Firstm I would learn the basics of how Shutter speed, Aperture size, and ISO all work together to form a correct exposure. Because you have the kit lens, there isn't much room for a lot of zoom. To capture the photo you are looking for you need an open aperture, a fast shutter speed, and depending on the light around you, a slightly higher ISO.

Here are some quick tips about the D5000 and how to use the different modes:

A-mode: This is aperture priority, you can use this mode to adjust the aperture for a desired Depth of Field. When you adjust the aperture, the camera automatically compensates by adjusting the shutter speed based on what aperture you have chosen.

S-Mode: This is shutter priority. This gives you control over your shutter speed. When you choose a shutter speed, the camera automatically compensates the aperture based off what you have chosen to produce a correct exposure.

M-mode: This is manual mode, you can change each setting independently to get any desired result you need at the time.

These are VERY basic rundowns of the different modes on your camera. I would spend time shooting in these modes and learning how they work. While you can read about then and learn about them through the cameras manual, it is important to take that step and start shooting with those modes, even if you do not know how to use them. Getting to know the technical aspects of your camera is a very important part of being able to produce quality photos.

You really need off camera flash to freeze motion, but as you are still 'getting to grips' with the camera (nothing wrong with that) then trying to tell you how to rig it might confuse you…

You could try a 'faster' lens (like the 50mm f1.8 lens) this will give you the lovely out of focus background AND allow a faster shutter speed than you'd get with your kit lens. This is actually an ideal lens to get for portrait work and its cheap & good (not often both of those come together).