Yes. Numeric packs commonly include the digits 0–9 (a 10-number set), so you can combine the digits to form multi-digit ages or anniversaries.
Each LED taper candle requires two AAA batteries. The 4-piece set lists a total of 8 AAA batteries (2 per candle).
Most birthday candles are made from wax (commonly paraffin wax). Some specialty styles—such as certain numeric or sparkler-style candles—may include metal components.
Options shown include classic solid colors (red, yellow, orange, green, blue), pastel hues (pink, yellow, green), metallics or shiny gold embellishments, iridescent sheens, and multicolored or rainbow numeric designs.
Sparkler number candles are intended for outdoor use. Ignite them with a lighter and allow the sparkler to burn out, or extinguish by submerging in water—do not blow them out.